var sizeParam string
if v, ok := d.GetOkExists("size"); ok {
	sizeParam = fmt.Sprintf("%v", v)
} else if v, ok := d.GetOkExists("initial_size"); ok {
	sizeParam = fmt.Sprintf("%v", v)
}

url = regexp.MustCompile("PRE_CREATE_REPLACE_ME").ReplaceAllLiteralString(url, sizeParam)
